20001121112020 has 24 divisors (see below), whose sum is σ = 42038469908064. Its totient is φ = 7993569288096.

The previous prime is 20001121111997. The next prime is 20001121112111. The reversal of 20001121112020 is 2021112110002.

It is a super-2 number, since 2×20001121112020² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429923454 + ... + 429969973.

It is an arithmetic number, because the mean of its divisors is an integer number (1751602912836).

Almost surely, 2^{20001121112020} is an apocalyptic number.

20001121112020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001121112020 is an abundant number, since it is smaller than the sum of its proper divisors (22037348796044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20001121112020 is a wasteful number, since it uses less digits than its factorization.

20001121112020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859894599 (or 859894597 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20001121112020 its reverse (2021112110002), we get a palindrome (22022233222022).

The spelling of 20001121112020 in words is "twenty trillion, one billion, one hundred twenty-one million, one hundred twelve thousand, twenty".